Elevator-door latch



ELEVATOR DOOR LATCH Filed March 22. 1922 A 'lNvENToR WILLIAM A.WILLIAMS AA; ATTYS.

l l i f "WILLLAM A; wiiinraivrs,ofr sonni/ natia pino.

Patented May 8, 1923.

l armaron-nouja Lfawrif Apncajtioil fue'd naciilrgafieaa. serialy ne. 545,879; f' i Zo all v@from 'tnica/concern LIA'M's, yacitiz'en of'the "United" States, resid? lingiat' ColumbusLin`the6unty offFranklin and State ,ofV4 Ohio, have invented "a lcertain new and4` useful Improvement'in ,Elevato/r4 Doof Lalteheaer :whichjuiefquowing' is a specification.

fin

The object of this invention is to provide for the door of an electrically operatedl elevator an improved safety latch of the kind requiringcomplete and effective closing of` the door before the car can be started.

@ther objects will appear from the following description. i A i The invention is'embodiedin theexam'- f ple herein shown and described; the features of novelty being finally `claimed.

In the accompanying drawingn Figure 1` is a vertical sectionalview showing theflatch about to close with the electric circuit broken. f

Fig. 2 is a similar view showing kthe latchl latched and the electriccircuit closed.

Fig. 3 is a transverse view of the circuit closing box.

Fig. 4 is a plan view of the circuit closing member.

In the views 5 designates the circuit closing box, which is to be mounted' at one of 4the upper corners of the door frame. Said box isof metal with removable sides vthat have linings 6 of mica. The top also has a lining of mica on which is superposed a fibre electrode holder 7 of insulating material. The part 7 is held up by tongued and grooved end linings 9 and 10. i The end linings are interchangeable and one only need be perforated as shown at 9a to admit the wires 24 of the elevator operating elec` tricv circuit. They upper yside lis provided with a layerk of libre insulating material 8 and said cover is hinged at 12, its insulating cover 8 projecting to form a stop to catch against the strike or keeper 5a of the case. The cover 8 is made thick enough so that the interior of the case is after installation at no time exposed to admit dirt or other matters adapted to interfere withrthe proper and successful operation of thecircuit closer.`

The circuit closer consists of a strip of metal 13 mounted slidingly Ona post 14 on the upper side of `thecover and held up rby a spring 14a against a cross pin 15 in the upper end of the post. Theelectrodes 16 ofl for depressing it,

cover it" contacts `fwithfthe`- electrodes with va circuit.' y l i Several inlets f for current conducting wires 24`t'o the box are shownso- 'astogpro` the"operatingcircuitjare securedfto posts-"1"( 'j secured' on the upperj 'insulating' member.

Becausethetcircuit'closer'ismoved infan arc' i having ifor its center the hinge i 12 of lthe lrubbin'g .Contact and so keeps thosel Contacts" L'H'z' lclean ind insures-'effectivenessin closing'the v vide for. difere'nces in installation conditions. Those inlets not usedfcanbe closedxv f with threaded plugsas shown at 18;"I'I`hef` l 'i circuit wires 24 are carried to the-,box .through'the usual.protectingpipe 23 cony nected tofone of said inlets.

.The door nach bou 19 `i'slprovlidai W'ith'if l. an anti-frictionl` rollerl 20.` This bolt' `is mounted in asuitable case 21 tobesecured tothe elevator door.y 'The bolt 19 is nor-- mally pressed upward, as usual, by a coil spring 22 vwithin the ybolt case. 'The bolt extends down to a vided with a suitablehandle `(not shown) to be opened.

. In operation when left to' close the same. the bolt strikes the inclined keeper lip "5@ keeper 5a said keeper the boltA latching the door and at the same time clos` point within easy reachl of the elevator operator where it is rpro#` the dem is Sud tothe ps5 and as it passes the,l it is thrown down.` After passingengages thecover and,- throws it up' as shown in Fig. 2 thereby ing the elevator operating circuit. Thefconi struction is such therefore `that theelevat'or 'as.usual, when the door is i l car cannot'be moved unless thedoor is `com.-

pletely latched and the power circuitl closed. f Should any ofthe parts become loose and` detached within'the box there is no danger,-

of such partsdivertingor grounding ythe cir-l f l` Y i cuit and causin'gi're1 shocks or alarm be' causeI the interior of the box is insulated.

It will be noted that screws to fasten the top and end insulation aref employed and that when the micaed sidesv are secured vto i the case: the top and end insulationsare se-f.

cured from removal;`

of the side walls.l

The forms of the =The end and top in- -sulations can be removed by removingone 105 parts vcan `bechanged .f

without departing `from the gistofthelinc vention as claimed; i

What I claim is:

1f. A latch case for an electricelevator door comprising, in combination, a box-like l eov structure, electrodes vfor an elevator operating circuit therein, said structure having a hinged cover carrying a spring-held circuit closer for said circuit and means for limiting the outward movement of said cover to vprevent the exposure of the interior of said CaSe.

2. A latch case for `an electric elevator outvvard movement of said` cover to prevent the exposure of the interior of said case. 3. A latch case Jior van electric elevator door comprising, in combination, a box-like structure, electrodes for an elevatori` operating circuit therein, a hinged cover carrying a spring held circuit closer for said circuit,

and insulatinglinings for theinterior of; said box-like structure and said cover.

4. In a Alatch device for an electric elevator door, in combination, a box-like structure, circuit therein, said structure having a hinged cover carrying aspring-held circuit closer for said circuit, and means for liniting the movement of said cover adapted to prevent the exposure of the interior of said structure in bothtlie circuitopened and circuit-closed positions of the cover.

WILLIAM A; WILLIAMS.

electrodes 'for an elevator operating 

